Tunneling-machine.



W. E. DEAN.

TUNNELING MACHINE.

APPLICATION FILED SEPT. I2, I9I2.

2 S HEETS-S HE cana W. E. DEAN.

TUNNELIN'G MACHINE.

, 12. 1,156,277. Patented 0ct.12, 1915.

2 SHEETS--SHEET 2.

WILLIAM E. DEAN, OF SUPERIOR, WISCONSIN.

TUNNELINGr-MACI-IINE.

Specification of Letters Patent.

Application filed September 12, 1912. Serial No. 720,077. 71,1 x

To all whom it may concern:

Be it known that I, I/VILLIAM E. DEAN, a citizen of the United States,residing at Superior, in the county of Douglas and State of Wisconsin,have invented certain new and useful Improvements in Tunneling-Machines, of which the following is a speciiication, reference being hadtherein to' the accompanying drawing.

My invention relates to improvements in tunneling machines.

This invention consists of certain new and useful improvements intunneling machines and relates particularly to such a machine fortunneling rock or such like substance.

The Objectis to provide a machine of the class named, in which theextent of cut upon the face of the work engaged is at all timespredetermined, that is to say, thereciproeating drills do not work atright-'angles to the face of the rock, but being carried at an angle tothe radial line of their vertical movement establish a new working planeat each advancement into the face of the work engaged-thus taking adepth of slice predetermined at each upward movement of the drillbattery, the battery being advanced y each time when the drills are intheir lowermost position until the entire face of the cutting bitengages the face of the surface being cut, then when raised on the areof a circle whose radial line is at a fixed angle to the center line ofthe drills, maintain the depth of cut first established up the entireface of the work.

Another object of my invention is to provide a tunneling machine of thischaracter which is simple in construction and effective in operation andhaving certain details of structure hereinafter more fully set forth.

In accompanying drawings, Figure l is a vertical longitudinal section ofthe end of a tunnel .showing a side elevation of my improvedtunnelingmachine; and Fig. 2 is a horizontal longitudinal section.

A strong rigid supporting frame is formed of preferably fabricated metalconstruction,

comprising the base, l; vertical columnsV 2 2 and top 3, this framebeing carried upon two suitably constructed skids or runners, 4f whichare designed to be movable longitudinally upon the floor ofthe tunnel.

vWithin the columns 2 and at the four corners of the supporting frameare carried rods or shafts, 5 5 and 6 6, the frame Vends of the samebeing screw threaded and susceptible of longitudinal movement inde--pendent of the frame but supported thereby, and for such longitudinalmovement I pref fer' to employ internally screw threaded chain driven,sheaves or sprockets, 7 which Patented Oct. 12, 1915.

may be operated in any desired manner for the purpose, or the shafts 5 5and 6 6 may be reciprocated in any other manner without departing fromthe spirit of my invention.

The forward ends of the shafts 5 5 are 'pivotally supported by skids 8and designed to move back and forth upon the floor of the tunnel. Theforward ends of the shaft 6 6 are each pivotally supported by a shoe 9engaging the roof 3 of the supporting frame and which are formedintegral with a downwardly extending segmental shaped, toothed rack l0,which r acks are each pivotally mounted upon the shoes 8 as illustratedin Fig. l at ll. Thus the racks 10 l0 are susceptible of fore and aftmovement indegaged by twin gears l2, designed tobe operated preferablyby worm gears 13 from suitable power such as a motor 14 or in anyA mnnerwhereby the gears 12, may be slowly and forcibly operated in eitherdirection for raising and lowering the battery of drills controlledthereby. V

15 represents the reciprocating either air, electricity or steamoperated, the two outside pairs of which are rigidly Xed to the gearcasing 16 of the gears l2 and are carried thereby, the intermediatedrills between the two pairs above mentioned are designed to be rigidlyiixed to the side pairs by through bolts 17 so that theentire battery ofdrills are at all times in the same plane and operate vertically inunison.

The drills l5 are fixed to the gear casing 16 at an angle differing fromthat of the .radial line of the rackslO-IO and gears 12,

so that the face of the cutting bits are not in a plane parallel withthe arc of the rack,

drills are designed to operate against .the face of v the tunnel, fromthe bottom upward, thus when a cut is to be made, the drills are placedin the position shown in the drawings and gradually advanced while atwork until, the entire face of the Abits are engaged,

when the forward motion is stopped and the battery gradually raised upthe face of the tunnel, the depth of cut being iixed by the angle of theface of the bits. Thus it is evident the entire face of the bit willimpinge the surface being cut as the battery is raised, whereas, if thedrills vwere carried in line with the radius of the racks as is common,only the upper edge of the bits would be engaged in work bywhich,arrangement great strain upon the drills `and entire mechanism isavoided and much better and easier work accomplished.

I prefer to have the cutting bits of the drill sufficiently large tocovery collectively the entire surface' laterally of the Jrace to beworked and to' Operate the reciprocation of the drills consecutively.

Having thus described my invention what I claim is: j

- 1. A tunneling machine, comprisinga vertically disposed support,horizontally adjustable arms carried by the support, shoes carried bythe outer ends of the support, segmental rack bars pivotally connectingthe shoes, a drill support surrounding the rack bars, a battery ofdrills carried by the support, pinions carried by the drill support andmeshing with the rack bars, and means for rotating said pinion wherebythe battery of drills may be moved in an arc of a circle.

2. drilling machine comprising a vertically disposed support,horizontally arranged adjustable arms carried by the upperand lower endsor said support, shoes pivotally carried by the outer ends of the saidarms, segmental racks connecting the upper and lower shoes, a drillsupport surrounding the rack bars, a battery of drills carried by thesupport, pinions carried by the drill support meshing with the rackbars, mea-ns'` for rotating said pinions whereby the battery of drillsmay be moved in an arc or a' cir-cie.l

3.l A drilling machine, comprising a verticallyl disposed frame',horizontally arranged rods extending through the said frame at its upperand lower ends, and screw threaded sprockets on said rods within the`frame', means' for operating said sprockets whereby the rods arelongitudinally adjusta'lble, shoes carried by the outer ends oi' therods,- segni-ental rack bars connecting the upper and lower shoes, adrill support surrbunding the rack bars, a battery of drills carried bythe support, pinions carried by the support and meshing with the rackbars, and a worm driving said pinions whereby the battery of drills maybe moved vertically in an arc of a circle.`

l; drilling machine, comprising a vert'ically disposed Jframe,horizontally arranged rods extending through the frame at its upper andlower ends and threaded, sprocketsV on said threaded rods within theframe, means for moving the said sprockets in unison, shoes pivoted andcarried by the outer ends of the rods, rack bars rigidly carried by theupper shoe and having its lower end pivotally connected to the lowershoe, a drill support surrounding the rack bars, a battery of drillscarried by the support, pinions carried by the support and meshing withthe rack bars, and a worm driving said pinions, whereby the battery ofdrills may be moved vertically in an arc oiI a circle.

5. A drilling machine comprising a vertically disposed frame,horizontally alrranged rods extending through the frame at its upper andlower ends and threaded, sprockets on said threaded rods within theframe, means for moving the said sprockets in unison, shoes Icarried bythe outer ends of the rods, rack bars rigidly carried by the upper shoeand having its lower end pivotally connected to the lower shoe, a drillsupport surrounding the rack bars, a battery of drills carried by thesupport, pinions carried by the support and meshing with the rack bars,a worm for driving said pinions, and nreans for driving said worinsubstantially as shown and described.

6. A drilling machine comprising a frame, a skid for' supporting saidframe, horizontally arranged rods carried by the upper and lower ends orthe frame, screw threaded sprockets on said rods within the Jframe,means for operating said sprockets in unison whereby the rods aresimultaneously adjusted in either direction, a plate carried by theupper end of said frame, shoes carried by the outer ends of the upperrods and resting against the plate, shoes pivotally carried by the lowerrods, segmental rack bars rigidly carried by the upper shoes, andpivo'tally connected to the lower shoes, a drill support surrounding thesegmental rack bars, a battery of drills carried by the support, pinionscarried by the support and meshing with' the' segmental rack bars, aworm operating said pinions and means operating th'e said rack,substantially as shown and described.

7. A tunneling machine, comprising a vertically disposed support,horizontally adjustable arms carried by the support, segmental rack barsca'rried by the arms, a drill siup'ort surrounding the rack bars, abattery of drills carried by thev support at an angle to the radialline' of the support, pinions carried by the drill support and meshingwith the rack bars, and means for rotating said pinions. v

l 8'. A drilling machine, comprising a vertically disposed support,horizontally arranged adjustabler arms carried by the upper and lo'werends of said support, shoes p'ivotally carried by the outer ends of saidarms, segmental racks connecting the upper and lower' shoes,a drillsupport surroundroo ing the racks, a battery of drills carried by Intestimony whereof I hereunto aix my the support at an angle to theradial line signature in the presence of tWo Witnesses.

of the support, pinions carried by the drills and meshing With the rackbars, and means WILLIAM E DEAN" for rotating said pinions whereby thebat- Witnesses:

tery of drills may be moved in an are of a NORMAN E. LAMOND,

circle, substantially as shown and described. S. GEO. STEVENS.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents, Washington, D. C.

